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Proceedings Paper

A machine vision-based method of high-precision measurement of the size of workpiece
Author(s): Xiyuan Jia; Tiantai Guo; Jun Zhao; Ming Kong; Shouchuang Lu; Yong Shen
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Paper Abstract

The posture and size of workpiece in pixel level can be determined through optimization of the internal parameters of the camera, utilizing the enclosing rectangle method based on rotation axis to position the workpiece. After selecting ROI of the object, the sub-pixel edge of workpiece is extracted using the bilinear interpolation algorithm and Hessian paradigm line fitting is utilized to find the object edge accurately. The industrial camera with 5 million pixels is used, and the sizes from 80mm to 150mm of the workpiece are measured under the condition of panorama shooting, with measurement repeatability reaching 0.015mm.

Paper Details

Date Published: 26 January 2016
PDF: 8 pages
Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99031Y (26 January 2016); doi: 10.1117/12.2214215
Show Author Affiliations
Xiyuan Jia, China Jiliang Univ. (China)
Tiantai Guo, China Jiliang Univ. (China)
Jun Zhao, China Jiliang Univ. (China)
Ming Kong, China Jiliang Univ. (China)
Shouchuang Lu, China Jiliang Univ. (China)
Yong Shen, China Jiliang Univ. (China)

Published in SPIE Proceedings Vol. 9903:
Seventh International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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